Knob attachment



UNITED STATES PATENT CFFICE.

CARL OT"O NOACK, OF STAMFORD, CONNECTICUT.

KNOB ATTACHMENT.

SPECIFICATION formingpart of Letters Patent No. 556,587, dated March 1'7, 1896.

Application filed January 16, 1896. Serial No. 575,740. (No model.)

T0 all whom, it may concern.-

Be it known that I, CARL OTTO NOACK, a citizen of the United States, residing at Stamford, in the county of Fair-field and State of Connecticut, have invented certain new and useful Improvements in Knob-Fasteners, of which the following is a specification.

This invention relates to an improved fastening device for knobs by which the knob can be rigidly attached to the spindle at any point of the same without requiring any screw-holes in the spindle, by which the weakening of the spindle and frequent breaking of the same are produced; and the invention consists of a fastener for door and other knobs, which consists of a knob-shank provided with an enlarged portion forming an annular recess or cavity, a locking-plate in said cavity, a spring-plate interposed between the locking-plate and a sleeve inserted into the enlarged portion of the shank, and a screw passing through the shank and engaging the locking-plate, so as to lock said plate and thereby the knob rigidly in position on the spindle.

In the accompanying drawings, Figure 1 is a side elevation of my improved door-knob, showing it applied to the spindle of a doorlock. Fig. 2 is a horizontal section of the door-knob and spindle on line 2 2, Fig. 1, drawn 011 a larger scale. Figs. 3 and 4 are vertical transverse sections on lines 3 3 and 44:, Fig. 2 5 and Figs. 5 and 6 are respectively a detail front view and vertical section on line 7 7, Fig. 5, of the locking-plate of the knobfastener.

Similar letters of reference indicate corresponding parts.

Referring to the drawings, A represents the spindle of a door-knob, which is made in the usual size and square cross-section, but without the usual screw-holes in each end,to which the door-knobs are applied. To the end of the spindle A is applied the shank B of the knob C, said shank having a square opening, so as to fit tightly on the spindle, and an enlarged portion 13 at its inner end, which is screwed into the bushing 12 at the inner central portion of the knob. Into the inner end of the enlarged portion B of the shank B is inserted a sleeve D, which is attached by a key or keys d to the enlarged portion of the shank B, said sleeve being made of less length than the cylindrical recess arranged around the spindle in the enlarged portion of the shank B, so as to form an annular space or cavity around the spindle for a disk-shaped locking-plate E.

The locking-plate E is provided with a square central opening or recess 6 of some-- what larger size than the cross-section of the spindle, so as to move freely on the spindle, said plate being cushioned by a conveXo-concave spring-plate E, which has a square central opening also somewhat larger than the spindle, both the locking-plate and the springplate being provided with notches e, that fit over the inner end of a projection or key 6 at the interior of the enlarged portion of the shank B diametrically opposite to a stopscrew F in the enlarged portion B.

\Vhen the locking-plate E and its springplate E are placed in position in the cavity.

formed by the shank B and the sleeve D, the latter is locked to the enlarged portion of the shank B and the knob then placed with its shank B in position on the spindle, and after being set to its proper position the stop-screw F is inserted into a screw-socket f in the enlarged portion of the shank, as shown. in Figs. 1, 2, and 3, the inner tapering end of said screw bearin g on .the locking-plate E and holding the same in inclined position against the cushioning spring-plate E, which again is pressed against the inner inclined end or face of the sleeve D, as shown in Fig. 2. The edges of the central opening or recess 6 of the locking-plate E bite thereby rigidly on the spindle and secure the rigid position of the knob on the spindle A whether the knob is pulled in outward or pushed in inward direction. The cushioning spring-plate E holds the locking-plate in contact with the stopscrew F and the inner end of the shank, and locks thereby the knob firmly to the spindle against motion in inward or outward direction without requiring the weakening of the spindle by screw-holes, so that a stronger spindle is obtained, to which the knob is al ways positively locked without any danger of playing loose and getting detached therefrom.

XVhen it is desired to remove the spindle from the lock for making repairs or otherwise, the stop-screw E is unscrewed, after which the locking-plate E and spring-plate E can be readily placed into position at right angles to the spindle, in which position the knob with its shank can be readily removed from the spindle and the latter then withdrawn from the lock.

My improved knob-fastener has the advantages, first, that the knob is positivelylocked to the spindle without weakening the same at any portion thereof; second, that the knob can be readily attached and then firmly locked to the spindle after being once placed in posit-ion thereon; third, that the means by which the locking of the knob to the spindle is accomplished are of strong and simple construction and readily replaced in case any one of the parts of the same should break or become injured by use.

Having thus described my. invention, I claim as new and desire to secure by Letters Patent 1. A knob-fastener, consisting of a knob, a shank having an enlarged portion screwed into the bushing of the knob, a sleeve inserted into the enlarged portion of the shank and a spring-cushioned locking-plate placed 011 the spindle in the space or cavity formed by the shank and sleeve, and a stop-screw in the enlarged portion of the shank, substantially as set forth.

2. A fastener for door-knobs, consisting of a knob, a shank, having an enlarged portion screwed into the bushing of the knob, a sleeve inserted into the enlarged portion of the shank, and provided with an inner inclined face, a locking-plate arranged in the space formed by the shank and sleeve, a cushioning spring-plate interposed between the lockingplate and the inclined face of the sleeve, and a stop-screw inserted into the enlarged portion of the shank and adapted to engage said locking-plate, substantially as set forth.

3. The combination, with the door-spindle, of a knob, provided with a shank having an enlarged portion screwed into the bushing of the knob, a sleeve keyed to the inner enlarged portion of the shank, the sleeve being provided with an inclined face, a locking-plate arranged in the space adjacent to the inclined face of the sleeve, a cushioning spring-plate between the locking-plate and the sleeve, and a lockin -screw passing through the enlarged portion of the shank, said locking-plate being provided with a central recess for the spindle and a notch at its outer edge for engaging a projection or key at the inner portion of the shank, substantially as set forth.

In testimony that I claim the foregoing as my invention I have signed myname in pres ence of two subscribing witnesses.

CARL OTTO NOACK. \Vitnesses:

PAUL GoEPEL, GEO. W. JAEKEL. 

